Yes, some communities conduct community-wide mosquito abatement programs. Whenever possible, the primary effort of such programs should be identification of mosquito-breeding sites, followed by removal or treatment of these sites with an insecticide used for control of mosquito larvae (the immature form of a mosquito). Also, homeowners should remove old tires and other unused water-holding containers, change the water in birdbaths, and drain wading pools weekly. Insect light electrocutors ("bug zappers") or sound devices do little to reduce biting mosquitoes in an area. Installing bird or bat houses to attract these insect-eating animals has been suggested as a method of mosquito control. However, there is little scientific evidence that this significantly reduces the mosquito population around homes.